手译的,还望各位高人指点
In fabricating the mould,some preparations are needed.The capability of the machine that are available in faculty are investigated.The machines that required in fabricating the mould are drilling machine,milling machine and grinding machine.The plastic injection moulding machine is also needed for producing the product.The machine that has been used is BOY 22D.Besides that,it is also required to search and purchase the mould base,which can fit the injection moulding machine.Carbon steel AISI 1050 had been selected as material for the mould base.Since some components such as ejector pin,locating ring,sprue bush,water junctions and springs are not included in the mould base,these components are purchased independently.The plastic material that has been used is ABS.
制造模具时,准备工作是必须的.可用设备的生产能力已经被调查过了.制造模具需要的机器有钻床,铣床和磨床.生产这个项目时注塑机也是必须的.设备的型号是BOY22D.除此之外,也需要寻找和购买适合注塑机的模架.Carbon steel AISI 1050最终被选为制作模架的原材料.由于某些原件诸如顶针、定位环、浇口套、弹簧等是不包含在模架里的,因此需要单独购买.注塑原材料使用的是ABS.
3.Mould design
There are four design concepts that can be used in this project.The description of these design concepts is as follows:
(a) Three-plate mould—Having two parting lines with single cavity.
(b) Two-plate mould—Having one parting line with single cavity without gating system.
(c) Two-plate mould—Having one parting line with double cavities with gating system and with ejector pin at the cavities.
(d) Two-plate mould—Having one parting line with double cavities with gating system and without ejector pin at the cavities.
3.模具设计
四种设计理念可用于设计此项目.描述如下：
(a) 三板模—— 一穴两分型面
(b) 二板模—— 一穴一分型面不带浇注系统
(c) 二板模—— 两穴一分型面,带浇注系统和顶针
(d) 二板模—— 两穴一分型面,带浇注系统,不带顶针
Since this project is limited in budget,the type of mould base that has been chosen is two plate mould instead of three plate mould.Among the design concepts for two plate mould,the concept ‘d’ has been chosen.This is because concept ‘b’ is non-productive while concept ‘c’ may damage the product during ejection.
由于项目预算有限,模架的型号由二板模取代了三板模而最后被采纳.在二板模的多个设计理念中,d理念最后被采纳,这是因为b理念无法用于实际生产,而c理念在注塑成型时有可能会损坏产品.
Generally,two plate mould consist of eight plates and there are their standard dimensions,respectively.The mould base that has been chosen must base on the specification of the injection moulding machine that will be used.In this project,the standard mould base with 250 mm × 250 mm has been used and its plates dimension are shown in Table 1.
通常的,二板模由八个板组成且它们都有各自的标准尺寸.模架的选择必须要依据将要使用的注塑机的标准.针对这个项目,标准模架的型号是2525（250 mm × 250 mm）,它的各个板的尺寸已在表格1中列示.
